Takashi Nakamoto

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Osteoporotic fractures are associated with substantial morbidity, increased medical cost and high mortality risk. Several equipments of bone assessment have been developed to identify individuals, especially postmenopausal women, with high risk of osteoporotic fracture; however, a large segment of women with low skeletal bone mineral density (BMD), namely(More)
In this paper, an extraction method of trabecular structures from dental panoramic radiographs using mathematical morphological operations is proposed. It can extract trabeculae excluding roots of teeth and enables the assessment of tooth extraction for trabecular pattern. A measurement method of the lengths and directions of trabecular segments is also(More)
Osteoporotic is a health burden worldwide, resulting in reduction of physical activity, increased risk of mortality, and incremental medical cost. Mandibular trabecular patterns analyzed on dental panoramic radiographs have been widely studied for identifying postmenopausal women with low skeletal bone mineral density (BMD). In this paper we proposed a new(More)
BACKGROUND Cholestatic liver diseases exhibit higher levels of serum γ-glutamyl transpeptidase (GGT) and incidence of secondary osteoporosis. GGT has been identified as a novel bone-resorbing factor that stimulates osteoclast formation. The aim of this study was to elucidate the interaction of elevated GGT levels and cholestatic liver disease-induced bone(More)
PURPOSE This study aimed to evaluate the trabecular bone changes after alveolar bone grafting in unilateral cleft lip and palate (UCLP) patients using a computer-aided diagnosis (CAD) system. MATERIALS AND METHODS The occlusal radiographs taken from 50 UCLP patients were surveyed retrospectively. The images were categorized as: 50 images in group 0(More)
Information on the morphological changes of mandibular on dental panoramic image is needed to detect various diseases, especially osteoporosis. Measure automatically the width of cortical bone is one of the measurement problems due to uneven illumination and noise disturbance of the image.This paper proposes a new system that can automatically measure the(More)
A thin or eroded cortex of the mandible detected on dental panoramic radiographs is independently associated with low skeletal bone mineral density (BMD) or osteoporosis in postmenopausal women. The purposes of this study were to develop new computer-aided diagnosis system that combines these two panoramic measures by using fuzzy neural networks (FNN) for(More)
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